Better detailing:
I believe he is suffering some type of attack, I suspected and put an antidotes, and he already blocked some addresses, that released the network and returned to normalize the server, but now it seems that a different attack has appeared, simply paste the CPU 100% processing and I do not know what to do, I hope someone helps me with this if possible giving me a north, some module that I can suggest for Apache, I know it has, but I do not know which one to use. / p>
Added 27/12/2017: Answering my own question, since this being difficult and ddos and annoying all the time the firewall blocks and this consumes system memory and etc, I found an anti-ddos module for apache, mod security, I will try to get information about it to build some knowledge on the subject through this question, I found some measures to protect itself by apache, starting with simple measures, until arriving at ddos, in my opinion if solved by apache itself believe consuming less memory and CPU than using external programs, it's not just protection for ddos, but if someone wants protection why not take more than one action, the focus of the question and the ddos, but I will be applying some of the measures I am posting on the article link I found, link